Electric-motor-supporting attachment for sewing-machines



H. W. CORNING.

ELECTRIC MoToII SUPPORTING ATTACHMENT FOR SEWING MACHINES.

APPLICATION FILED lAN.27I |920.

Patented July 5, 1921.

HENRY W. CORNING, 0F CLEVELAND, OHIO.. ELECTRIC-MOTOR-SUIPPORTING ATTACHMENT FOR SEWING-MACHINES.

Specification of Letters Patent.

Application led January 27,` 1920. Serial No. 354,452.

To all whom t may concern.'

Be it known that I, HENRY W. CORNING, a citizen of the of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Electric-Motor-Supporting Attachments for Sewing-Machines, of which the following is aspecification. f'

This invention relates to means for supporting electric motors in connection with sewing machines in a manner whereby the motor may be readily shifted from an operative position of driving engagement with the hand-wheel of the machine, to'v an inoperative position beneath the overhangi'ng bracket arm of the machine where it will not interfere with the placing of the cover in position. l

The object of the invention is to provide an improved motor sup-portin and adjusting means of the character re erred to that will be simple, inexpensive, and more eii'iciernt generally than those now in use. This object is attained bythe novel construction and arrangement of parts embodying my invention as hereinafter described in connection with the accompanying drawings, in which- Figure 1 is a re`ar side elevation of a sewing machine having a motor mounted thereon by means embodying my invention, the machine being shown in dotted lines and the motor and its supporting means in full lines. In this view the motor is shown inv its operative driving position, and is also shown by broken lines in its inoperative position beneaththe overhanging frame arm of the machine.

Fig. 2 is a motor swung to its inoperative position beneath the overhanging frame arm of the machine. l

Fig. 3 is a detail of the connection between the motor and its vsupporting bracket arm, looking in the direction of the arrow 3 in Fig. 2, and showing the means for limiting the downward turning movement of the motor on its supporting bracket arm when not in operative position.

Fig. 4 is a similar view, looking in the direction of the arrow 4 in. E ig. 1, and showing the relation of the same parts with the motor in its raised operative position.

Similar reference characters indicate like parts in the several figures of the drawings. The sewing machine to which my 1m- United States, andresident 'overhanging arm 11, and

plan view of the same with the provements arel applied may be-of any suitable construction, the same as here shown having a frame comprising a base 10 and a driving shaft (not shown) journaled in said overhanging arm with its rear end projecting beyond the same and having secured thereon the usual hand-wheel 12.

Suitably mounted in fixed position on the base of the machine frame, as by means of the fastening screws 14, is an upright bracket 15 havinga vertical socket 16, in which is journaled a pivot extension 17 of a horizontal bracket arm 18, which latter rests on the upper end of said bracket. Pivotally mounted on this bracket arm 18 is an electric mo-tor 19 provided with a ing engagement the machine.

The connection between the motor and the bracket arm, as here shown, is effected pulley 21 adapted for drivwith the hand-wheel 12 of by means of a pair of lu 22,22, on the motor casing, having per orations through which the bracket arm extends. As a means for holding the motor with its pulley 21 in frictional driving engagement with the hand-wheel of the machine, a coiled spring 23 is located on the bracket arm with one end 24 connected with a disk 25 on said arm and its opposite end 26 bearing against one of the motor lugs 22. The tension of this spring may be varied as desired by turning the-disk 25 on its support and securing the same in fixed adjusted position by suitable fastening means, such as the set screw 27.

The motor supporting bracket arm 18 is of course adapted to be held stationary when the motor is in its operative position of driving engagement-with the hand-wheel of the machine, and as a simple andeective means for doing this, 1 have provided the bracket 15 at its Aupper end with4 a notch 30 in. which the arm 18 is received andheld against turning movement, as shown in F ig. 1'.

' When the machine ,is not in use and it is desired toy place the cover thereon, the motor is then adapted to be shifted from its operative position of driving engagement with the hand-wheel 12, to an inoperative posi*- tion beneath the overhanging frame arm 1l.

To do this, the motor supporting bracket army having Va driving'shaft 20 iso position of engagement with the hand-wheel 12. When this is done, the motor is rocked on its supporting arm 18 under the action of the spring 23, as shown by broken lines 5 in Fig. 2, until lowered sufficiently to permit it to pass beneath the overhanging frame `arm 11, to which position it is subsequently shifted, as shown by broken lines in Fig. 1 and .by full lines in Fig. 2. men the motor` is brought to this latter position, it I is there held stationary by the engagement of its supporting arm 18 with a second notch in the bracket 15, indicated at 31. rlhese notches 30--31r in the bracket 15 form a very simple and effective means for holding e the motor supporting arm 18 stationary in its different positions, as the weight o-f the motor is sufficient to seated in the notches, lthe arm therefrom may by simply raising the arm nary to swinging the same motor to a desired position.

When the motor is lowered preliminary to being moved to its inoperative position be` neath the machine arm as described, itis desirable that it should be 'heldin a predetermined stationary position with respect to its supporting arm. Any suitable means may be employed for this purpose. As here shown, the end 24 of the spring 23 which connects with the adjusting disk25, is made of sufcient length to project through the and disengagement of be readily effected slightly prelimifor shifting the movement of the adjacent motor lug 22 and form a stop to limit the downward movement of the motor, as shown in Figs. 2 and 3'. As a means for obtaining a more effective driving contact between the motor pulley 21'and the machine wheel 12, which latter is formed with the usual transversely convex peripheral surface as shown, ll have provided said? pulley with a pair of friction rings 33, 33, formed of rubber or similar material, which are spaced to engage the machine wheel at opposite sides of its pe l ripheralecenter; thisarrangement of parts having been'I found to be' most effective and satisfactory for the purpose.`

Another important feature of the present invention is the loose connection between the motor supporting bracket arm 18 and the stationary bracket 15, 'which permits. of the motor being readily connected with and disconnected fromhe machine without the aid of fastening means of any kind.

- What l claim is i 1. In combination with a sewing machine having a drivingwheeh of a bracket on the 60 machine having a vertical socket and pos- .tioning notches at the upper -end thereof, a

horizontal bracket arm resting-on the upper end of said bracket and having a pivot* loosely fitting the 'socket therein, and a mo- @5 tor having a pulley for driving engagement .hold the arm firmly.

bracket arm to be shifted engaging notch of said disk" into the path of with the machine wheel and being mounted on said bracket arm to be shifted thereby to and from its operative driving position, the said arm engaging within the said notches of the bracket to be held'stationary thereby 7` in different predetermined positions.

2. ln combination with asewing machine having a driving wheel, of a bracket o n the machine having positioning notches at its upper end, a horizontal bracket arm pivotally mounted on said bracket for swinging movement and being vertically movable relatively to the bracket for engagement with and disengagement from the notches there` in, and a motor having a pulley for driving engagement with the machine wheel and being mounted on said bracket arm to b e shifted therebyl to and from its operative driving position, the said arm engaging the bracket within its said notches to be held stationary thereby in different predetermined positions.

3. lin combination with a sewing machine having a driving wheel, .of a bracket on the machine having a socket therein, a horizontal bracket arm `resting on the upper end of said bracket and having a pivot loosely fitting the socket therein, a motor havinga pulley for driving engagement with the machine wheel and being mounted on said.

thereby to andv from its operative drivmg position, and means on the bracket engaging the said bracket arm. for holding the same stationary in dierent predetermined positions.

4:. ln combination with a sewing machine having an overhanging frame arm and a driving wheel, of a bracket arm pivotally mounted on the machine for movement in a horizontal plane, a motor having a pulley 105 for driving Vengagement with the machine wheel and being mounted on said bracket arm to be shiftedthereby from its operative driving position to an inoperative position beneath the frame arm, the motor beng ful- 11@v crumed on the bracket arm for rocking movement in a vertical plane from a raised operative position to alowered position per:l mitting of its passing beneath the frame arm, and a spring -carried by the bracket 115 .arm for holding the motor-in driving en gagementwith the machine wheel.

5.v ln combination with a sewingmachine having an overhanging 'frame arm and a ice `driving wheel, of a bracket onthe machine, l

voperative driving position to an inoperative position beneath the frame arm, the motor being fulcru'med on thev bracket arm for rocking movement from a raised operative position to a Alowered position permitting-of 13@ its passing beneath the frame, and means on the bracket for holding the bracket arm stationary in its operative and inoperative positions.

6. In combination with a sewing machine having an overhanging frame arm and a driving wheel, of a bracket on the machine Ahaving a vertical socket and transverse positioning notches at the upper end thereof, a horizontal bracket arm resting on the upper end of said bracket for sliding movement thereon and having a pivot loosely tting the socket therein, a motor having a pulley for driving engagement with the machine Wheel and being mounted on said v bracket arm to be shifted thereby from its operative driving position to an inoperative posltion beneath the frame arm, the vmotor being fulcrumed on the bracket arm for rocksaid notches to be held stationary therebyv with the motor in its operative and inoperative positions, and a spring carried by the bracket arm` for holding the motor in both its raised and lowered positions.

Signed at Cleveland, in the county of Cuyahoga and State of Ohio, this 23d day of December A. D. 1919.

. HENRY W. CORNING. 

